[rsl7]

I don't doubt that will be attempted, but it's ridiculous from every angle. If such things are remotely reasonable, then everyone with a product will be trying to do it. You'll be inundated with "real world products, discounts, etc" from everything you touch. You'll end up rejecting the entire system flat out just to escape.

This is the same reason location-based offers won't work either - because everyone will be trying to give you an offer, and they'll try to SEO-game the system so that categories and personalization don't work as filters.

It's cool that my calendar has reminders, right? But I have five devices that all remind me of the same event, all at once and I end up turning off reminders whole-hog because I'm tired of configuring every single scenario and every single device. Sync is great right up until I hate it more than anything and death would be sweet release.